Throw_2.java: New.

2002-03-28  Andrew Haley  <aph@redhat.com>

	* libjava.lang/Throw_2.java: New.
	* libjava.lang/Throw_2.out: New.

From-SVN: r51515

libjava/testsuite/ChangeLog

+2002-03-28  Andrew Haley  <aph@redhat.com>
+
+	* libjava.lang/Throw_2.java: New.
+	* libjava.lang/Throw_2.out: New.
+
 2002-03-27  Anthony Green  <green@redhat.com>
 
 	* libjava.lang/InvokeReturn.java: Modify test for targets

libjava/testsuite/libjava.lang/Throw_2.java

+// Check that NullPointerExceptions thrown from library code are
+// caught.  This detects a number of failures that can be caused by
+// libgcj being built incorrectly.  In particular, we ensure that a
+// SEGV in native (i.e. C++) code in libgcj is handled correctly.
+
+// Regrettably, we cannot guarantee that Double.parseDouble() will
+// always be native code, or that it will never be inlined.  It could
+// be argued that we should add a method to libgcj that will be
+// guaranteed forever to be native, but I'm reluctant to add to the
+// library for the sole purpose of performing this test.
+
+public class Throw_2
+{
+  public static Throwable obj()
+    {
+      return null;
+    }
+
+  public static String str()
+    {
+      return null;
+    }
+
+  static double d;
+
+  public static void main (String[] args)
+    {
+      // This NullPointerException will, at the time of writing, be
+      // thrown from Java code in libgcj.
+      try
+	{
+	  java.util.Vector v = new java.util.Vector (null);
+	  System.out.println ("fail: no exception thrown");
+	}
+      catch (NullPointerException _)
+	{
+	}
+      catch (Throwable _)
+	{
+	  System.out.println ("fail: " + _);
+	}
+      // This one will, at the time of writing, be thrown from C++
+      // code in libgcj.
+      try
+	{
+	  d = Double.parseDouble(str());
+	  System.out.println ("fail: no exception thrown");
+	}
+      catch (NullPointerException _)
+	{
+	}
+      catch (Throwable _)
+	{
+	  System.out.println ("fail: " + _);
+	}
+    }
+}